by Davo Smith.
If you have enabled the 'resubmission' feature, then, after you have marked a student's work, all feedback and attempts will be shown at the bottom of the student's submission page (in the collapsed 'history' section).
See (my) blog post here for a walkthrough: http://www.synergy-learning.com/moodle-2-5-improvements-assignment-resubmissions/